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Old 03-22-2020, 10:50 AM   #1
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GFI/GFCI question

Forum,


I have read most articles pertaining to this subject, but I have run out of options when troubleshooting a finnicky GFI. Keeps "randomly" tripping.



Here are the facts:


1) AC panel is wire as sub-panel (no independent ground, only a neutral).


2) AC panel has ground conductor bar/bus connected to neutral bar/bus.


3) GFI/GFCI is first in the circuit.


4) All receptacles, lights, and breaker have been replaced.


Help, need suggestions.


D in Texas
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Old 03-22-2020, 10:53 AM   #2
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Have you tried replacing the GFI? Just asking
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Old 03-22-2020, 11:26 AM   #3
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Are we talking about an RV or a stationary building?

I have a pole barn and had fluorescent ceiling lights on the same GFCI circuit as wall outlets. The GFCI would trip occasionally when turning on the lights. I rewired the fluorescent lights to a separate circuit and the GFCI trips stopped.
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Old 03-22-2020, 11:27 AM   #4
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GFI will be changed soon. It is in a very tight location and a PITA to work on.


Trailer is currently being renovated so it is not gone critical yet.
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Old 03-22-2020, 11:29 AM   #5
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Originally Posted by BehindBars View Post
Are we talking about an RV or a stationary building?

I have a pole barn and had fluorescent ceiling lights on the same GFCI circuit as wall outlets. The GFCI would trip occasionally when turning on the lights. I rewired the fluorescent lights to a separate circuit and the GFCI trips stopped.

Horse trailer with LQ.
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Old 03-22-2020, 12:22 PM   #6
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Quote:
GFI will be changed soon. It is in a very tight location and a PITA to work on.
changing the GFI with a quality unit will probably solve your problem... they can and do get finnicky
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Old 03-22-2020, 12:43 PM   #7
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Quote:
Originally Posted by djglover7 View Post
Forum,


I have read most articles pertaining to this subject, but I have run out of options when troubleshooting a finnicky GFI. Keeps "randomly" tripping.



Here are the facts:


1) AC panel is wire as sub-panel (no independent ground, only a neutral).


2) AC panel has ground conductor bar/bus connected to neutral bar/bus.


3) GFI/GFCI is first in the circuit.


4) All receptacles, lights, and breaker have been replaced.


Help, need suggestions.


D in Texas
1) AC panel is wire as sub-panel (no independent ground, only a neutral). This is wiring for a main panel not a sub panel.

Sub panel must have neutral and ground separate. Neutral must be Isolated and any grounds bonded to metal


2) AC panel has ground conductor bar/bus connected to neutral bar/bus. This is wiring for a main panel


3) GFI/GFCI is first in the circuit. GFI is just a short abv for GFCI


What are you using when this random tripping happens??
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Old 03-22-2020, 12:46 PM   #8
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We ordered six from Best Buy , 4 were bad . We went to Ace and paid more for good ones .
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Old 03-22-2020, 01:14 PM   #9
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Quote:
Originally Posted by cavie View Post
1) AC panel is wire as sub-panel (no independent ground, only a neutral). This is wiring for a main panel not a sub panel.
Sub panel must have neutral and ground separate. Neutral must be Isolated and any grounds bonded to metal
2) AC panel has ground conductor bar/bus connected to neutral bar/bus. This is wiring for a main panel
3) GFI/GFCI is first in the circuit. GFI is just a short abv for GFCI
What are you using when this random tripping happens??

I used the wrong term. I thought I recalled someone referring to it as a "sub-panel" application. The construction is as I described. The feed is a standard 30A (3 conductor cable) from the shop.


I say random because it was happening before and after replacement of receptacles & lights (both types). On one occasion, I was standing nearby (stable electrical situation) and I heard the GFI trip.


Also, I was under the impression that I should NOT run AC to ground on the frame or aluminum body.



D
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Old 03-22-2020, 01:27 PM   #10
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Originally Posted by wanderingbob View Post
We ordered six from Best Buy , 4 were bad . We went to Ace and paid more for good ones .
good ones what
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